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https://github.com/FEX-Emu/FEX.git
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66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
// SPDX-License-Identifier: MIT
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/*
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$info$
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tags: LinuxSyscalls|syscalls-shared
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$end_info$
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*/
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#pragma once
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#include <CodeEmitter/Emitter.h>
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#include <FEXCore/fextl/unordered_map.h>
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#include <linux/filter.h>
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#include <linux/seccomp.h>
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struct sock_fprog;
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struct sock_filter;
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namespace FEX::HLE {
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class BPFEmitter final : public ARMEmitter::Emitter {
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public:
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struct WorkingBuffer {
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struct seccomp_data Data;
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uint32_t ScratchMemory[BPF_MEMWORDS]; // Defined as 16 words.
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};
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BPFEmitter() = default;
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uint64_t JITFilter(uint32_t flags, const sock_fprog* prog);
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void* GetFunc() const {
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return Func;
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}
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size_t AllocationSize() const {
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return FuncSize;
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}
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private:
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template<bool CalculateSize>
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uint64_t HandleLoad(uint32_t BPFIP, const sock_filter* Inst);
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template<bool CalculateSize>
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uint64_t HandleStore(uint32_t BPFIP, const sock_filter* Inst);
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template<bool CalculateSize>
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uint64_t HandleALU(uint32_t BPFIP, const sock_filter* Inst);
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template<bool CalculateSize>
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uint64_t HandleJmp(uint32_t BPFIP, uint32_t NumInst, const sock_filter* Inst);
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template<bool CalculateSize>
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uint64_t HandleRet(uint32_t BPFIP, const sock_filter* Inst);
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template<bool CalculateSize>
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uint64_t HandleMisc(uint32_t BPFIP, const sock_filter* Inst);
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template<bool CalculateSize, class Pred>
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uint64_t HandleEmission(uint32_t flags, const sock_fprog* prog);
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fextl::unordered_map<uint32_t, ARMEmitter::ForwardLabel> JumpLabels;
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fextl::unordered_map<uint32_t, ARMEmitter::ForwardLabel> ConstPool;
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using JumpLabelIterator = decltype(JumpLabels)::iterator;
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void* Func {};
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size_t FuncSize {};
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};
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} // namespace FEX::HLE
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